EMS texted me that there was a courier, but I didn't buy anything.

First of all, we should pay attention to whether this is cheating money. For example, if you want to reply to a text message, don't reply, so as not to cheat money.

Second, once again, it may be that your friends, colleagues and relatives are having a good time and want to give you a surprise and give it to you.

Third, if it is the second point, you can ask the courier to deliver it to your home. You can open the courier in person to see what it is, and see the address and phone number of the other party.